摘要
本文在光学诊断型携带流煤粉反应器系统上开展煤粉着火及燃烧特性初步研究,通过数值模拟手段说明了试验系统设计和试验配气方案的合理性,考察了环境温度、环境氧浓度、煤种对煤粉着火延时及主燃烧段长度的影响。研究表明:在近炉内燃烧条件下,粒径为53~80μm烟煤煤粉和褐煤煤粉两者的着火延迟时间以及挥发分着火延迟时间都随着环境温度的提高而变短;褐煤煤粉主燃烧段长度比火焰中挥发分的主燃烧段长25 cm左右,比之前研究的高氧浓度环境下两者的差值更大;与烟煤相比,褐煤燃烧反应性对环境温度提高更加敏感。
The study of ignition and combustion characteristics of pulverized coal was carried out in an optically diagnostic entrained flow pulverized coal reactor system. The rationality of the design of the experimental system and the scheme of the test gas distribution are illustrated by means of numerical simulation.The effects of ambient temperature,ambient oxygen concentration and coal type on ignition delay time and length of main combustion zone were investigated. The results show that,ignition delay time and Volatile ignition delay time as well as the bituminous and the lignite（ 53 - 80 μm） decrease with the increase of ambient temperature; The length of main combustion section of lignite is about 25 cm longer than the former research of volatile component in flame,which is greater than the former research of high oxygen concentration environment,Compared with bituminous coal,combustion reactivity of lignite is more sensitive to the increase of environmental temperature.
作者
邹高鹏
齐洪亮
朱文堃
孙锐
宋梦龙
彭江波
ZOU gao - peng;QI hong - liang;ZHU wen - kun;SUN rui;SONG Mong - long;PENG jiang - bo(Department of Mechanical Systems, China Helicopter Research and Development Institute, Jingdezhen 333001, China;School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;R ＆ D center , Huadian Distributed Energy Engineering Technology Co. , Ltd. , Beijing 100160, China;National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China)
出处
《节能技术》
CAS
2018年第3期208-213,共6页
Energy Conservation Technology
基金
国家重大科学仪器设备开发专项(2012YQ040164)
国家自然科学基金重点项目(51536002)
关键词
煤粉
着火
燃烧
携带流反应器
光学诊断
数值模拟
pulverized coal
ignition
combustion
entrained flow reactor
optical diagnostics
numericalsimulation
